Combined carpenter&#39;s square and miter-gage.



C. F. BENJAMIN.

COMBINED CARPENTERS SQUARE AND MITER GAGE.

APPLICATION FILED IIINE I9. I9`Ia.

1,295,841. A l Patented Mm. 4,1919. EET- 1; A:E If...

CZareNccFe/zjamzfm UNTTED sTaTEs PATENT onirica.

CLARENCE F. BENJAMIN, F. MILFORD, CONNECTICUT.-

COMBINED CARPENTERVS SQUARE AND MITER-GAGE,

y To all whom t lmay concern.'

Be it known that I, CLARENGE F. BEN- JAMIN, a citizen of the United States, resid-y ing at the town of Milford, county of New Haven, State of Connecticut, have invented certain new and useful Improvements in Combined Carpenters Squares and Miter- Gages; and I do declare the following to be a full, clear, and exact description of the invention, such as Willenable others skilled in the art to which it appertains to make and use the same.

This invention relatesto certain new andv useful improvements in a combined carpenyters square and miter gage, and more particularly to an improvement on the construction shown and described in my Letters Patent Nos. 1,226,172 and 1,226,173, issued May 15, 1917.

In my were pivoted together and that had interengaging teeth and notches, although hardened, readily became loosened so as to wabble at their pivotal connection. This was due to the factthat the teeth on the upper bladewere kept engaged with the notchesby a strong sprin and when the user wanted to adjust the bla es to a certain langle he swung the blades around `their pivotal point thus raising the teeth out of the notches against the resiliency of the spring, which 'caused these teeth to score heavily against the surface o-f the lower blade and this constant loosening the blades sol scoring resulted in that they could no longer become snug and tight. Y

The aim of this improved construction is to provide a simple and efficient combined square and miter gage which will not become worn in the manner above noted and will not become loose and inaccurate.

A further object of the present invention is to provide a special locking` cam. lever which is mounted on the s e pivot pin which connects the blades land is provided a with teeth on its underside rto engage in recesses lor depressions that are formed inthe upper ortop blade. When this cam or clamping lever has its teeth engaged in these recesses in the top face of the upper lever,

' .i the blades can Ibe-moved freely to any adjustment, and when-such adjustment 1s arrived at the cam lever is simply swung to one side or the other to bring the teeth on the cam-lever out of the depressions in the top lever, thereby causingthe teeth to exert Specification of Letters Patent.

former construction the blades that Patented Mar. 4, 1919.

Application iiled J une 19, 1918. Serial No. 240,753.A

a camming pressure against the top blade to hold the interengaging teeth and notches of the two blades firm. Y'

This invention further resides inthe features of construction and the arrangements and combinations vof parts hereinafter described and claimed, reference being made to the accompanying drawing wherein:

`Figure 1 is a fragmentary elevation of a combined square and miter gage embodying the present invention and showing the clamping lever inoperative:

' Fig. 2 is a similar view vin which the clamping member is operatively disposed:

Fig. 3 is a plan of the lower or bottom blade depicting the concentric series of recesses therein :l

Fig. 4 is a bottom plan view of the topV blade;

Fig. 5 is an edge view thereof;

' Fig. 6 is a view similar to Fig. 1 illustrating a modifica-tion of the. invention:

Fig. 7 is asimilar View depicting a further modification; and

Fig. 8 is a sectional view therethrough online 8 --8 ofFig. 7.

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Referring more in detailtothe accompanying drawing, the numeral 1 designates the 'bottom blade and 2 theA top blade which is pivotally connected to the bottom blade by thepivot bolt 3 so that it may be swun to assume any angular relation thereto. he edges of the bladesv are provided with the inch and fractional inch markings 1, the inchesV being numbered consecutively from one blade to the 'other sov that when the blades are adjusted at an angle of`180O they combine to form a straight edge or rule with the inches `numbered consecutively throughout its length.

Y The bottom blade is formed with a circular series of recesses 5 in its upper face about thepivot bolt or pin 3, andthe top: blade is formed with asimilar series vof.`

operation is only permitted when the teethteeth 9 for engagement in the re- 6 are engaged, in the recesses 5," and when; the.

the recesses for providing clamping pressure mounted on said pivot means and provided between said blades. with diametrically opposite teeth for riding 6. A combined square and miter gage inin and out of the recesses to release and 10 cluding a plurality of blades, means piw clamp the blades.

5 otally connecting them at one end, one In testimony WhereofI ailix my signature.

blade having a plurality of recesses in its upper faces, and a clamping member CLARENCE F. BENJAMIN.

Copie: of v"this patent may be obtained for @ya cents each, by addressing the "Commissioner o! I'atentl.

' I Washington 9.6." 

